Detergent



Patented Apr. 30, 1935 UNITED STATES PATENT OFFICE DETERGENT No Drawing.Application December 14, 1929, fie-laal No. 414,223. In Germany August8,

3 Claims. (Cl. 87-5) It is a known fact that alkaline phosphates such asdescribed for example in British Patent No. 253,554, accepted September14, 1927, and

6- particularly tri-sodium phosphate or sodium orthophosphate possess anextraordinarily strong solvent power for all kinds of fats and oils in adegree rendering them suitable as fat solvents and cleaning agents,particularly in the iron industry, in automobile factories, etc. Theabove mentioned salts however, show a disadvantage inasmuch as theireffects may fully be brought out only if the objects to be cleaned asfor instance metal parts etc. be boiled in the watery solutions of thosesalts. Nor do these salt solutions possess any lather properties therebydiffering in this regard very materially from the most commonly usedsoap bodies employed as cleaning agents.

Certain discoveries resulted in the preparation of extraordinarilyvaluable compounds in which the above mentioned phosphates, particularlythe tri-sodium phosphate were more or less brought together with thesulphonates of organic bodies. The mixture for instance containingbesides 75% of tri-sodium phosphate, 25% tetra-hydronaph--thalenesulphonate or sodium, yields strong lathery solutions that evenat ordinary temperatures, produce cleansing effects to the fullestmeasure. Moreover, they yield a not inconsiderable wettingout property,although neither ingredient used by itself has satisfactory wetting-outproperties. The above mentioned salt compounds therefore, may be used toadvantage not only like the phosphates in the iron industry, but goingbeyond this point, also particularly in the textile industry.

I also may use and substitute for the above mentionedtetra-hydronophthalenesulphonate of sodium, other salts of thissulpho-acid, as for instance the salt of potassium, of ammonium or saltsof organic bases. However, I also may substitute in their place thecorresponding salts of other sulphonic acids as for instance thenaphthalenesulphonic acid and its salts, the sulphuric acid ester ofhigher molecular alcohols, Turkeyred oil, etc. The percentage also ofthe individual ingredients as contained in the mixture may range withinvarying limits. For instance I get an extraordinarily valuable productwhen bringing together phosphate holding of tri-potasslum with a 50%octodecylalcoholsulphuric acid ester neutralized through ammonia.

I claim:

1. A detergent having lathering and wettingout properties comprising 50%of tripotassium phosphate and 50% of theammonium salt of the sulphuricacid ester 01' octadecyl alcohol.

2. A detergent having lathering and wettingout properties comprising incombination an alkali metal phosphate and the sulphuric acid ester of ahigh molecular primary aliphatic fatty alcohol having lathering anddetergent properties approximating those of the sulphuric acid ester ofoctadecyl alcohol.

3. A detergent as defined in claim 2 wherein 30 the alkali metalphosphate and the sulphuric acid ester are present in a ratio of 3 to 1.

PETER FRIESENHAHN. 35

